Is there a better way I could have run this loop. (For loop with two variables) Post: 302301448

Sponsored Content

Top Forums Shell Programming and Scripting Is there a better way I could have run this loop. (For loop with two variables) Post 302301448 by DeCoTwc on Thursday 26th of March 2009 11:09:51 PM

03-27-2009

Registered User

Is there a better way I could have run this loop. (For loop with two variables)

Sorry for such a dreadful title, but I'm not sure how to be more descriptive. I'm hoping some of the more gurutastic out there can take a look at a solution I came up with to a problem, and advice if there are better ways to have gone about it.

To make a long story short around 20K pieces of equipment de-registered, and the only way to re-register them relies on using a manual script that needs the equipments MAC address and IP address. Unfortunately there is no current way to run the script against a file with the information. So I decided that a loop would be the best way to go about it.

What I wound up doing was creating a pipe delimited file with the equipment info, and running the following against it:

Code:

[mystro@mys-nycnm-srv01 scripts]$ head -5 IP
00:0F:21:FE:29:67|10.130.192.173
00:0F:21:FE:2D:57|10.140.66.207
00:0F:21:FE:2E:21|10.153.200.37
00:0F:21:FE:2E:88|10.141.146.134
00:0F:21:FE:2E:CA|10.157.206.8

[mystro@mys-nycnm-srv01 scripts]$ for i in `cat IP`;do mac=$(echo "$i"|cut -f1 -d\|);ip=$(echo "$i"|cut -f2 -d\|);/usr/local/mystro/scripts/mdiags cid reg $mac $ip;done

It worked perfectly, but as I'm (obviously) not the most skilled scripter I always like to hear critiques from more experienced people.

IE: Should I have not used echo...is there an easier way to isolate the info than cut...etc.

DeCoTwc

View Public Profile for DeCoTwc

Find all posts by DeCoTwc

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

using variables outside a while loop

Hi Guys, I have a scripts that uses a while loop to read a file and set 2 variables. How can I do this so the variables can be used outside the while loop ? Below is an example....# ./junk2 -m -e user EXE=user master=TRUE DB_TAG=PRODUCT In loop MST=MST=testsvr1:3110 In loop ARGS=...

2. Shell Programming and Scripting

Using variables created sequentially in a loop while still inside of the loop [bash]

I'm trying to understand if it's possible to create a set of variables that are numbered based on another variable (using eval) in a loop, and then call on it before the loop ends. As an example I've written a script called question (The fist command is to show what is the contents of the...

3. Shell Programming and Scripting

SH: two variables in for loop

Hi, say I have a simple sh script like this: for i in a b c d do for j in 1 2 3 4 do echo "$i $j" done done and the output is a 1 a 2 a 3 a 4 b 1

4. Shell Programming and Scripting

Two variables in a for loop

Can we assign two variables in a for loop? I have an input file: 000301|20100502 835101|20100502 I want to read this file in a for loop and assign values to two different variables. I did this now but did not work for STORE,RUNDATE in `awk -F\| '{print $1,$2}' inputfile ...

5. Shell Programming and Scripting

Need help in for loop with 2 variables

Hi, I need help on for loop need to add domain and IP In domain list 1.com 2.com 3.com In Ip list 1.1.0.1 1.2.0.1 1.3.0.1 1.com 1.1.0.1 2.com 1.2.0.1 3.com 1.3.0.1 I need to excute this command

6. Shell Programming and Scripting

Help with a For loop and variables

Greetings. I'm completely new to shell scripting and quickly trying to catch on. Here's my scenario: I have a text file, named ip.txt, containing IP addresses. I want to automatically perform a whois query on each address in the file, search the output for the country, and then put both the IP...

7. Shell Programming and Scripting

for loop with 2 variables

i am having a file contants as below my requirement is for file in `awk -F "," '{print $8,$9}'` <temp.txt echo "$file" echo "$file">test.txt a=`awk -F "," '{print $1}' `<test.txt b=`awk -F "," '{print $2}' `<test.txt but script reads , i want both the vales for further...

8. Shell Programming and Scripting

Need to loop three variables

Hi, I have a out from a command i need to grep a report. For that i need loop 3 variable for that. How i can loop need help. Symmetrix ID : 123456 Masking View Name : Host16 Last updated at : 04:13:06 PM on Thu Mar 17,2011 Initiator Group Name : Host16 Host...

9. Shell Programming and Scripting

Loop through variables

I am pretty new to Unix. Trying to pick up some slack while a coworker is out on vacation. Basically the script is working fine however when I go through the testing phase and have to make mods it is a pita. Here is an example of what I have #!/bin/ksh if then echo...

10. Shell Programming and Scripting

Help with variables in loop

Hello, please assist: users="test1 test2" keytest1="abcd" keytest2="dbcd" for i in $users do echo "$key${i}" > fileout done So, my objective is to take the current user (ie test1) in loop and echo its associated keyname (ie keytest1) variable to a file. The echo...

LEARN ABOUT DEBIAN

smd-loop

smd-loop(1)						 Sync Mail Dir (smd) documentation					       smd-loop(1)

NAME

       smd-loop - iterates smd-pull and smd-push

SYNOPSIS

       smd-loop [-vt]

DESCRIPTION

       smd-loop  runs  smd-push and smd-pull at regular intervals as defined by the user in the ~/.smd/loop configuration file. On errors that are
       reported to be transient, it retries a second time before failing.

       The configuration file is line-oriented. Each line is composed of three space separated fields:	pull-frequency,  push-frequency  and  end-
       point-name. Frequencies are expressed in minutes, while endpoint name is a valid name for smd-pull(1) and smd-push(1). Lines beginning with
       # are considered as comments. The following example calls the command smd-pull default every 3 minutes,	and  smd-push  default	every  10.
       Example:

	   # pull-frequency push-frequency endpoint-name
	     3		    10		   default

OPTIONS

       -v     Increase program verbosity (printed on stderr)

       -t     Just create a template configuration file if none

FILES

       ~/.smd/loop

SEE ALSO

       mddiff(1), smd-server(1), smd-client(1), smd-push(1), smd-pull(1)

AUTHOR

       Enrico Tassi <gares@fettunta.org>

								   11 June 2012 						       smd-loop(1)